Molding-machine



(No Model.)

G. o. AVERY. MoLDING MACHINE;

x Patnted O ot. 31, 1893-.`

UNITED STATES PATENT OFFICE.

GEORGE C. AVERY, OF LOUISVILLEIKENTUCKY,

MOLDING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 507,577, dated October 31, 1893.

Application tiled November 25, 1892. Serial No. 453,007. (No model.)

To all whom, it may concern:

Be it known that I, GEORGE C. AVERY, of Louisville, in the county of Jefferson and State of Kentucky, have invented a certain new and useful Improvement in Molding-Machines; and I do hereby declare that the following is afull, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification.

My invention relates to machines for making molds in sand, or other material, and such as are used generally for the molding, or casting, of articles in metal.

Previous to my invention machines have been made by the use of which, after a sufficient quantity of sand, or other suitable material, had been placed in a receptacle, and a pattern arranged in contact with and partially surrounded by the sand, the latter was subjected to pressure, to compress and solidify the mass, and so as to perfect the impression in the mass of sand of the pattern of the article to be subsequently cast in said mold; but I propose to provide for use a machine radically different, in principle of construction and mode of operation, from any heretofore devised, and one which shall be capable of more efficient, rapid, and easy use, than any heretofore made that I know of.

To this main end and object my invention consists in a molding machine comprising the novel characteristic features-fand combinations of devices which will be found hereinafter more fully described, and that will be found most particularly pointed out in the claims of this specification.

To enable those skilled in the art to which my invention relates, to make and use molding machines containing, either partially, orv Wholly, my said improvements, I, Will now proceed to more fully describe the latter, referring by letters to the accompanying drawings, which form part of this specification, and in which I have shown my invention carried into effect in that form of machine in which I have, so far, practiced it, though modifications therein may be made without departing from the spirit of my said invention.

In the drawings, Figure l is a side view, or elevationv of a machine fully embodying my invention. Fig. 2, is an end view of the same, looking at the machine in the direction indicated by the. arrow 2, at Fig. l. Fig.` 3, is a vertical cross section at the line fr, of Fig.

1, looking in the direction of the arrow marked 3. Fig. 4, is a vertical longitudinal partial section at the line y, y, of Fig. 2, and Fig. 5 is a detail view, showing, in perspective, and detached from the'rest of the machine, a modified form of mold-supportingplate, or device.

In the several figures the same part will be 4found always designated by the same letter of reference.

A, is the body, or main-frame of the maf chine, which, as shown, is cast with two upwardly projecting stand-like portions B, B

(one at each end), each of which has a square forms, essentially, the sand, and mold-supporting plane; and with depending ear-like parts f, f, one at each end andlower portion of the casting, which ears f,f are bifurcated, or slotted out, to accommodate the angulaiportions of tWo bell-cranks, or bent levers, G, G, that are pivotally hung therein. The inner ends of the piston rods 5,62, are provided, respectively, with plungers, or pistons D and E, which are of about the same size,and which, in the case shown, are square in contour, and patterned, or shaped, much after the pattern of a press; while the outer ends of said rods b and b2, are slotted out, and are pivotally connected, respectively, with the upper ends of the vertical arms of the bent levers G, G. In the case shown, the pivotal connections, or couplings, between said piston rods and the upper ends of said bent levers, comprise the pins g, g, arranged horizontallyin the slottedI ends of the rods b,b2, and transversely of their slots, and oblong apertures e, in the ends of the bent levers, through which said pins pass.

h, h, are the pivotal pins which pass through the ear-pieces f, f, and through the body-portions of the bent levers G, G, for the latter to turn on, and the adjacent ends 71,71 of said levers are supposed to be connected with and operated by a toggle-joint, or other suitable'Y mechanism, to which power is applied at the "if" *I* pleasure, or option, of the attendant of the machine, to elfectuate the necessary up and down movement of these ends ,z', for the performance (as will be presently explained) of the said compressing operation in making the mold.

C is a sort of sliding frame, or receptacle, which, for about one-half of its length, comprises only two vertical walls, or side-plates, (which are just far enough apart to permit the entrance and passage between them, of the plungers, or pattern-like devices D and E,) and which, during the other half of its length, comprises the said vertical walls, and also a top-plate Z, preferably cast integral with the said side-plates. The lower, parallel, edges of the side walls of said frame-like device C, are enlarged and formed, in the case shown,with a sort of dovetailing feet,which are accommodated within, and slide freely in correspondingly shaped grooves, or channels, cut in the horizontal, plate-like portions a, a, of the main casting (see Figs. 2 and all as clearly shown in the drawings.

Preferably, plates, or shoe-pieces m, are arranged intermediate of the tapering surfaces of the lower edges of the frame C, and the tapering,or beveled, surfaces of the channels cut in the casting a; which shoe-pieces, or wear-plates, are backed up by a series of set screws n, by means of which the plates can be adjusted, and the longitudinally sliding, lower, edges of frame C kept in fit, or in perfect working condition, in the ways, or channels, in which they move. The side-plates of the device C are provided exteriorly, and in the case shown, at about their middle portions, with bosses 0, o, in which are fitted trunnions, or outwardly projecting pins, to which are pivotally coupled one set of ends of the two link bars I, I, the other ends of which are coupled, as clearly shown, to the upper ends of a pair of vertically arranged arms J, J, which, at their lower ends are keyed fast to a rock-shaft M. The said shaft is journaled, near each end, in the depending earpieces N, M (see Fig. 2) of the main casting, or body of the machine, and keyed fast on said rock-shaft M, is a hand leverF (see Figs. l and 2), by means of which said shaft may be oscillated at pleasure, to effectuate the sliding of the frame C, as will be presently described.

H is a plate, which, as shown, is arranged in a transverse depression, or recess, formed in the top surface of the portion a of the main casting, and which rests on six (more or less) set screws s, which are tapped into the plate-like part a of said casting, and the ends of which protrude upward through said casting, at the vicinity of the recess, or depression, within` which said plate H is located. Preferably, these set screws s are of hardened steel, so that their ends, which contact with and support the plate H will be very durable, and, by preference, the said plate is provided with aseries of metallic buttons, or button-like projections e, (see Figs. 1 and 5,) which serve a special purpose to be presently explained.

In the machine shown, at Figs. l to 4t, in-

clusive, the device H is a simple flat narrow plate, while at Fig. 5 is shown a modification of this device, in which the plate H is supplemented with vertical upwardly projecting pieces H2, and a top brace, or tie-rod w, which lies parallel with the bottom plate of the device, and serves to connect and hold together securely, the vertical walls H2 of the device.

The machine shown and so far described and mainly, with reference to the construction and arrangement together of its parts,

operates, or is worked, in the following manner: Snpposing the movable parts to be set in, or adj usted to, about the positions, or condition, illustrated in the drawings (see particularly Figs. l and 4), and supposing any desired pattern, or patterns, (to be molded) to be secured in place on the face, or faces, of one, or both, of the plungers D, E, the attendant, or operator, of the machine fills in, with sand, the space bounded on two opposite sides by the side walls of the frame C, and on two other opposite sides by the faces of the plungers D and E (with their attached and inwardly projecting patterns); the sand, or other material for forming the mold resting, of course, on the top surface of the platelike portion a, of the main casting of the machine, and, incidentally, also on top of the plate H. After having thus properly packed the said space, or receptacle, with the molders sand, the operator then lifts the handie, or free end of lever F, and thus turns the rock-shaft, with its upwardly projecting, fast, arms J, J, sufficiently far to cause said arms to vibrate at their upper ends, and,

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through their link connections I, I with the sliding frame C, move the latter 'far enough (in the direction indicated by the arrow at Fig. 4), to place said frame C in the position indicated by the dotted lines at Fig. et, or so that the mass of sand, located between the opposing faces of the plungers D, Ewill be encompassed, late rally, by that portion of the device C whichis provided with the top-plate l. The mass of sand will then be completely restrained within the envelope, formed laterally of the mass, by the top-plate Z, and sideplates of the device C, and the top surface of the plate-like portion a of the main casting of the machine (from which the device C cannot rise, though it be free to slide longitudinally on said device ci); and the two ends, so to speak, of the mass of sand will be opposed, or contacted by the two plungers D andF.. The operator now causes the adjacent ends t, i', of the bellcranks G, G to be depressed (through the medium of any suitable power multiplyingmechanism,ordevices,inotshown, and by the application of foot power, or some other motor), to an extent suiiicient to oscillate the bell-cranks G, G, on theirfulcra h, 7L, and thus move the piston rods b, b2, in opposite directions, and so as to make the plungers D and E approach each other to the ITO pression, or impressions, therein of the pattern, or patterns secured to one, or both, of said plungers. Having thus completed the compression of the mold material, and perfected the mold, the operator; while the plungers remain, or are still held in the positions just ascribed to them, depresses the free end of hand-lever F, and thereby, through the devices connecting the rock shaft M, with the device C, slides the latter back to its original position; and, thence, farther back until it stands entirely clear ofthe completed sand mold. He then causes the adjacent ends c', 'L' of the bell-cranks G, G, to be elevated to their original positions, or farther, which effectuates the complete disengagement of the patterns on the plungers from the sand mold, leaving the latter free to be lifted out of the machine. The removal of the finished mold, from the machine, is facilitated by the support of the plateH, since the plate may be easily lifted out of the machine and set to one side, with the sand mold resting on it. In practice I usually set the finished molds on a metallic, or stone, table made perfectly level, so that two, or more, molds can be placed properly face to face; and for this purpose, the hardened, button-like, projections z, are very useful, to

properly support the molds, and also to standY the wear to which the points of support are subjected in sliding,r the molds along on the hard supporting table, or surface.

If the modified form of mold-sustaining plate, or device, seen at Fig. 5, be used, the side walls H2, serve to support the opposite sides, or edges, of the finished mold, said side walls being tied together by the top-bar w, and under some conditions, as to the size and character of the mold, this modified form of device H maybe preferable.

Of course, so far as the main features of myv invention are concerned, either one, or more, patterns, or parts of a pattern, may be used on either one, or both, of the plungers, and if deemed expedient, one of the plungers might be a fixture (or stationary), While the other one might have all the motion necessary to do all the compressing of the mass, or charge necessary to the completion of the mold.

Such changes and others maybe made without departing from the main features of novelty involved in my machine, and in practice, the main casting A should, of course, be provided with some suitable means of support, though none is shown in the drawings.

The particular detail construction shown, especially with reference to the two plungers moving in opposite directions; and the arrangement of the plate H, or 4its equivalent, with its button-like feet, I prefer; because it renders the machine well adapted to the purposes of carrying into effect a new way of making molds, oran improvement in the art of making molds, that I have invented, and which constitutes the subject matter of another application for Letters Patent by me, filed January 5, 1893, Serial No. 459,730,which, has no necessary connection with this case.

The forms and proportions of the parts may, of course, be varied, to suit the judgment of the machine builder, and according to the nature of the work to be done, and, wheredeemed expedient, several, duplicate, patterns may be secured to one plunger, and simultaneously impressed into one mass of the sand, or other mold material.

. Havingnow so fully explained my improved molding machine that those skilled in the art can make and use the same, what I claim Y therein as new, and desire to secure by Letters l. In a molding machine, the combination, with a suitable table-like surface, for supporting the sand, or other material, of which a mold is to be made; and two opposing surfaces, projecting from said table, one of which, at least, is movable, bodily thereon; of a sliding frame-like device, comprising two walls (which, with the aforesaid opposing surfaces and the said table-like surface constitute a receptacle for the sand, or other material), and having a partial top-plate; the whole constructed to operate in such manner that with the sliding frame-like device set,V

in different positions, an open receptacle is formed to be filled in with the mold material, a closed receptacle is formed within which the material may be compressed to form the mold, and the completed mold is freed of all closely surrounding devices; in order that it may be removed from said table-like surface.

2. In a molding machine, the combination,

with a main, body, portion, formed or prof vided, withV a table-like device a, and perforated piston rod stands B, B; opposing platens, orplungers, D and E, arranged to move toward and from each other, and having their piston rods b and b2A arranged in the said stands B, B; and the sliding frame-like device G, of means for simultaneously mov-V ing 6the plungers, in opposite directions, and mechanism by which the operator of the machine can set the sliding device C in different positions for theperformance, respect,

In presence of- C. F. HUHLEIN, J. A. GRAY..

GEORGE C. AVERY.

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